Steam channel component, cover body and cooking utensil

Abstract

The utility model discloses a steam channel component, a cover body and a cooking utensil, the steam channel component is of a hollow structure, a steam discharge channel is formed in the inner wall face of the steam channel component, the steam discharge channel comprises a flow inlet channel section, a flow passing channel section and a flow outlet channel section, and the flow inlet channel section is connected with the flow outlet channel section through the flow passing channel section; a steam inlet is formed in the end, away from the overflowing channel section, of the inflow channel section, and a steam outlet is formed in the end, away from the overflowing channel section, of the outflow channel section. The cross sectional area of the overflowing channel section is smaller than the cross sectional area of the inflow channel section and the cross sectional area of the outflow channel section; the minimum cross sectional area S12 of the overflowing channel section is larger than or equal to 15 mm and smaller than or equal to 600 mm. A narrow space is formed in the middle of the steam discharge channel, bubbles are squeezed in the narrow space, and part of the bubbles are broken under the action of external pressure; the flow speed of cooking steam in a narrow space is high, bubbles are deformed due to large shearing force borne by the bubbles, and the bubbles are broken; the bubbles flow through the narrow space, are extruded and then are expanded again, so that part of the bubbles are broken.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of kitchen electrical appliances, in particular to a steam passage component, a cover body and a cooking utensil. BACKGROUND

[0002] The existing cooking utensils such as electric rice cookers usually have a structure forming a steam passage on the cover body, which generally includes a steam inlet on the cover plate, a sealing ring and a steam valve. The steam in the cooking cavity can be discharged to the external environment via the steam inlet and the steam valve. The sealing ring is arranged between the cover plate and the steam valve and around the steam inlet.

[0003] Generally, the structure forming the steam passage has an anti-overflow design, for example, the steam inlet of the steam valve is arranged on the vertically arranged side wall, which can achieve some anti-overflow effect. However, the anti-overflow effect of the steam passage is generally, and the bubbles / foam will still overflow during high-heat cooking.

[0004] Therefore, a steam passage component is needed to at least partially solve the above problems. SUMMARY

[0005] A series of simplified concepts are introduced in the summary part of the utility model, which will be further described in detail in the specific embodiment part. The summary part of the utility model does not mean to try to limit the key features and necessary technical features of the claimed technical solution, nor to try to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, the utility model provides a steam passage component for a cooking utensil, which is a hollow structure and has an inner wall forming a steam discharge passage for discharging cooking steam,

[0007] The steam discharge passage includes an inflow passage section, an overflow passage section and an outflow passage section, the inflow passage section is connected with the outflow passage section via the overflow passage section, the end of the inflow passage section away from the overflow passage section is provided with a steam inlet, and the end of the outflow passage section away from the overflow passage section is provided with a steam outlet.

[0008] Wherein, the cross-sectional area of the overflow passage section is smaller than the cross-sectional area of the inflow passage section and also smaller than the cross-sectional area of the outflow passage section; the overflow passage section has a minimum cross-sectional area S12, and the minimum cross-sectional area S12 is: 15mm²≤S12≤600mm².

[0009] According to the scheme, the internal space of the steam discharge passage gradually decreases in the steam flow direction, then gradually increases, and has a narrow space with a cross-sectional area of 15mm2 to 600mm2 at the flow passage section. The bubbles are squeezed at the narrow flow passage section, and part of the bubbles are broken under the action of external pressure. And the flow rate of cooking steam at the flow passage section is large, and the bubbles will be subjected to a larger shear force, which will deform the bubbles and cause the bubbles to locally thin out to break. After the bubbles are squeezed, they are expanded again, and the deformation will also cause part of the bubbles to break, which increases the bubble breaking capacity of the steam passage member.

[0010] Optionally, the inflow passage section has a maximum cross-sectional area S11, and 25mm2≤S11≤900mm2.

[0011] According to the scheme, the steam discharge passage has a larger space with a cross-sectional area of 25mm2 to 900mm2 at the inflow passage section, so that the bubbles can be effectively broken in the flow passage section under the action of external pressure, and the steam can smoothly pass through the flow passage section, better avoiding the increase of the pressure of the steam discharge passage due to poor steam discharge.

[0012] Optionally, the outflow passage section has a maximum cross-sectional area S13, and 25mm2≤S13≤1050mm2.

[0013] According to the scheme, the steam discharge passage has a larger space with a cross-sectional area of 25mm2 to 1050mm2 at the outflow passage section, so that the effect of bubble breaking by expansion in the outflow passage section is better, and more bubbles are broken due to expansion. And the steam can smoothly pass through the flow passage section, better avoiding the increase of the pressure of the steam discharge passage due to poor steam discharge.

[0014] Optionally, the cross-sectional area of the inflow passage section gradually decreases in the axial direction of the inflow passage section away from the steam inlet.

[0015] According to the scheme, by means of the tapered inflow passage section, the flow rate of cooking steam can gradually increase to achieve a larger flow rate at the flow passage section, so that the bubbles can be broken more effectively under the action of a larger external pressure in the flow passage section. And the tapered inflow passage section design is convenient for production and manufacturing by injection molding process, and is easier to demold.

[0016] The cross-sectional area of the outflow passage section gradually increases in the axial direction of the outflow passage section towards the steam outlet.

[0017] According to the scheme, the flow velocity of the cooking steam can be gradually reduced by means of the gradually expanding outflow passage segment, the expansion effect on the bubbles in the outflow passage segment is better, and more bubbles are broken due to expansion.

[0018] Optionally, the cross-sectional area of at least a portion of the flow passage segment is constant in the axial direction of itself.

[0019] According to the scheme, the bubbles can be effectively extruded in the flow passage segment, the bubble breaking effect is better, and more bubbles are broken due to extrusion; and the structure is simple, facilitating production and manufacturing.

[0020] Optionally, the flow passage segment has a first size L1 in the axial direction of itself, the steam discharge passage has a second size L2 in the axial direction of itself, and the first size L1 is: L1≥1 / 5L2.

[0021] According to the scheme, the flow passage segment can provide a certain flow length, so that the bubbles can be extruded and deformed effectively under the action of external pressure for a certain time, more bubbles are broken; and the acceleration effect on the bubbles and the cooking steam is better, effectively improving the shear force of the bubbles and accelerating the breaking of the bubbles.

[0022] Optionally, the steam inlet and the steam outlet are opposite in orientation and at least partially overlap in the axial direction of the steam discharge passage.

[0023] According to the scheme, the steam discharge passage is a straight passage, and the cooking steam flows approximately in a straight line as a whole, which can reach a higher flow velocity and facilitate accelerated breaking of the bubbles.

[0024] Optionally, the end face of the inflow passage segment is completely open to form the steam inlet, and the end face of the outflow passage segment is completely open to form the steam outlet.

[0025] According to the scheme, the cooking steam can reach a higher flow velocity at the flow passage segment, which facilitates accelerated breaking of the bubbles; and the structure of the steam passage member is simple, facilitating production and manufacturing by injection molding process, easier demolding, and higher production efficiency.

[0026] The steam passage member is arranged in a vertical direction, the steam inlet faces downward, and the steam outlet faces upward.

[0027] According to the scheme, the cooking steam can flow in the steam discharge passage from bottom to top, and the cooking steam can have a higher flow velocity at the flow passage segment compared with horizontal flow, which accelerates the breaking of the bubbles.

[0028] According to another aspect of the present application, a cover is provided for a cooking appliance, wherein the cover comprises the steam channel member according to any one of the above aspects.

[0029] According to this solution, a steam channel component is provided in the lid body, which can improve the anti-overflow effect of the cooking utensil, so that when the cooking utensil is cooking, even in the continuous boiling stage with a large amount of steam, the bubbles in the cooking steam can be effectively removed to prevent liquids such as rice soup from overflowing.

[0030] According to another aspect of the present application, a cooking utensil is provided, comprising a pot body and a cover body according to the above, wherein the cover body is openably arranged on the pot body to form a cooking space therebetween, and a steam inlet of the cover body is connected to the cooking space.

[0031] According to this solution, a steam channel component is provided in the lid body, which can improve the anti-overflow effect of the cooking utensil, so that when the cooking utensil is cooking, even in the continuous boiling stage with a large amount of steam, the bubbles in the cooking steam can be effectively removed to prevent liquids such as rice soup from overflowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings:

[0033] Figure 1 is a schematic cross-sectional view of a cooking utensil according to a preferred embodiment of the present application;

[0034] Figure 2 for Figure 1 A schematic cross-sectional view of the cover shown in ;

[0035] Figure 3 for Figure 1 A perspective schematic diagram of the removable cover assembly in an inverted state as shown in FIG;

[0036] Figure 4 for Figure 1 A schematic top view of the cover shown in FIG;

[0037] Figure 5 for Figure 1 A three-dimensional schematic diagram of a steam valve shown in FIG.

[0038] Figure 6 for Figure 1 A three-dimensional schematic diagram of the steam valve shown in FIG. 1 is shown in FIG. 2 when viewed from above;

[0039] Figure 7 for Figure 1 A schematic cross-sectional view of a channel seal shown in FIG;

[0040] Figure 8 for Figure 1 The exploded perspective view of the steam valve shown in FIG.

[0041] Figure 9 for Figure 1 A schematic cross-sectional view of the steam valve shown in FIG. 1 taken along a plane extending in the front-to-rear direction;

[0042] Figure 10 for Figure 1 A schematic cross-sectional view of the steam valve shown in FIG. 1 taken along a plane extending in the left-right direction;

[0043] Figure 11 for Figure 10 A three-dimensional schematic diagram of the valve lower cover in a top-down perspective;

[0044] Figure 12 for Figure 10 A three-dimensional schematic diagram of the valve cover in an inverted state;

[0045] Figure 13 A schematic structural diagram of an alternative solution for the spiral channel according to the present application;

[0046] Figure 14 for Figure 10 A schematic cross-sectional view of the valve lower cover taken along a plane extending in the front-to-back direction;

[0047] Figure 15 for Figure 10 A bottom view of the valve lower cover;

[0048] Figure 16 for Figure 10 A bottom view of the valve lower cover in FIG, wherein the steam channel component is removed from the outflow channel section;

[0049] Figure 17 The figure is a comparison diagram of the power curves of the experimental test embodiment and the comparative example.

[0050] Description of reference numerals:

[0051] 1 cooking utensil 2 lid

[0052] 3 pot body 4 inner pot

[0053] 5 pot mouth sealing ring 6 lining

[0054] 7-side cover assembly 8-side cover

[0055] 9 panel 10 removable cover assembly

[0056] 11 cover plate 12 cover plate seat

[0057] 13 receiving portion 14 mounting cylinder

[0058] 15 temperature measuring device 16 temperature measuring probe

[0059] 20 steam passage assembly 21 steam inlet

[0060] 22 steam outlet 30 steam valve

[0061] 31 upper valve cover 32 lower valve cover

[0062] 33 bottom wall of lower valve cover 34 backflow port

[0063] 35 flow guide portion 36 lower recessed portion

[0064] 37 bottom wall of lower recessed portion 38 upper surface of upper valve cover

[0065] 39 lower surface of upper valve cover 40 drainage wall body

[0066] 41 pattern 42 partition plate

[0067] 50 passage seal 51 main body portion

[0068] 52 deformed portion 53 mounting groove

[0069] 60 steam passage member 61 end portion of inflow passage segment

[0070] 62 end portion of outflow passage segment 63 steam inlet

[0071] 64 steam outlet 65 first wall body

[0072] 66 second wall body 67 transition portion

[0073] P steam passage P1 steam drainage passage

[0074] P11 upper end portion of steam drainage passage P12 lower end portion of steam drainage passage

[0075] P2 valve inner cavity P3 steam discharge passage

[0076] P31 inflow passage segment P32 flow-through passage segment

[0077] P33 outflow passage segment P4 helical passage

[0078] Di axial direction D1 first direction

[0079] D2 second direction D3 vertical direction

[0080] S cooking space DETAILED DESCRIPTION

[0081] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to unnecessarily complicate the present application.

[0082] For a thorough understanding of the present application, reference will be made to the following detailed description. It is apparent that the implementation of the present application can take many different forms without departing from the spirit of the application. The present application will be described with reference to preferred embodiments.

[0083] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0084] The ordinal numbers such as "first" and "second" used in the present application are merely identifiers instead of any other meaning, for example, a particular order. Also, for example, the term "first component" does not by itself imply the existence of a "second component", nor does the term "second component" by itself imply the existence of a "first component".

[0085] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and similar terms are used for explanatory purposes only and are not limiting.

[0086] Reference will now be made to the drawings to describe the example embodiments of the present application in more detail. However, these example embodiments can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. It will be understood that the embodiments are provided so that the disclosure of the present application is complete and comprehensive and fully conveys the concept of the example embodiments to those skilled in the art.

[0087] Referring to Figure 1The utility model provides a kind of cooking utensil 1, it includes cover 2 and pot body 3.Pot body 3 has the inner pot storage part of cylindrical shape.Inner pot 4 can be fixedly arranged at inner pot storage part, or can freely be put into inner pot storage part or be taken out from inner pot storage part, to facilitate the cleaning of inner pot 4.Inner pot 4 is usually made of metal material and upper surface has circular opening, for containing material to be heated, such as rice, soup etc.Pot body 3 includes heating device for heating inner pot 4, for example heating disc, to heat inner pot 4.

[0088] It can be understood that the cooking utensil 1 according to the utility model can be electric rice cooker, electric pressure cooker or other cooking utensil 1, and the cooking utensil 1 can have various functions such as cooking porridge in addition to the function of cooking rice.

[0089] Cover 2 has substantially corresponding shape with pot body 3.Cover 2 is openably arranged on pot body 3, specifically, it is pivoted to pot body 3 by pivot shaft, and can freely pivot around pivot axis of pivot shaft between closing position and opening position relative to pot body 3, to facilitate closing and opening of pot body 3.When cover 2 is closed on pot body 3, it covers on inner pot 4, and forms cooking space S between cover 2 and inner pot 4.Cover 2 usually also has pot opening sealing ring 5, which can be made of, for example, rubber material, arranged between cover 2 and inner pot 4, for sealing cooking space S when cover 2 is in closing state.

[0090] It should be noted that the directional terms used in the description of various components, parts, etc. of pot body 3, such as "upper", "lower", "upper", "lower", "up", "down", "up", "down" are relative to the cooking utensil 1 in the horizontal placement, upright state and the cover 2 in the closing position. The directional term "front" refers to the direction of the cooking utensil 1 facing the consumer, "rear" refers to the direction of the cooking utensil 1 away from the consumer, "left" refers to the direction of the cooking utensil 1 corresponding to the left hand side of the consumer, and "right" refers to the direction of the cooking utensil 1 corresponding to the right hand side of the consumer.

[0091] As shown in Figure 1 And Figure 2 Cover 2 basically includes inner liner 6 and face cover assembly 7. Face cover assembly 7 is arranged on the upper side or outer side of inner liner 6 and can cover inner liner 6. The upper surface of face cover assembly 7 is provided with a user interaction area for user operation. Inner liner 6 can be connected with face cover assembly 7 by suitable means such as clamping, fastener connection such as screw, adhesion, etc. The pivot shaft is arranged in the inner liner 6 and is sleeved with a torsional spring to automatically open the cover. Face cover assembly 7 can include face cover 8 and face plate 9 located on the upper side of face cover 8, and face plate 9 has an operation area for the consumer to operate the cooking utensil 1. Face plate 9 can be connected with face cover 8 by suitable means such as clamping, fastener connection such as screw, adhesion, etc.

[0092] The cover body 2 further comprises a detachable cover assembly 10. The detachable cover assembly 10 is arranged at the lower side or inner side of the inner liner 6 and detachably connected to the inner liner 6 so that the detachable cover assembly 10 is detachably mounted on the cover body 2 from the lower side. For example, the detachable cover assembly 10 is movably connected to the inner liner 6 by means of a plug-in and / or snap-in structure. The detachable cover assembly 10 substantially comprises a cover plate 11, a cover plate seat 12 and the aforementioned pot opening sealing ring 5. The cover plate 11 can be optionally a metal plate. At least a part of the lower surface of the cover plate 11 forms a top surface of the cooking space S. The cover plate seat 12 is capable of detachably connecting the cover plate 11 to the inner liner 6. The outer peripheral portion of the cover plate 11 can be connected to the cover plate seat 12 by means of fastening such as buckling or fasteners or other suitable means. A part of the pot opening sealing ring 5 is pressed between the cover plate 11 and the cover plate seat 12.

[0093] The cover body 2 further comprises a steam passage assembly 20 which forms a steam passage P capable of discharging cooking steam generated in the cooking space S during cooking to the outside environment. The steam passage assembly 20 is located at the substantially rear portion of the cover body 2. Specifically, as shown in Figure 3 , a steam inlet 21 of the steam passage P is arranged at the cover plate 11, and the steam passage P communicates with the cooking space S via the steam inlet 21. Optionally, as shown in Figures 4 to 6 , Figure 8 , the steam passage assembly 20 comprises a steam valve 30. A valve inner cavity P2 of the steam valve 30 forms a part of the steam passage P. As shown in Figure 4 and Figure 5 , a steam outlet 22 of the steam passage P is arranged at the steam valve 30. The steam outlet 22 communicates with the valve inner cavity P2. The steam passage P communicates with the outside environment via the steam outlet 22 at the valve inner cavity P2, so that the cooking steam in the steam passage P is discharged to the outside environment.

[0094] The steam valve 30 can be connected to the face cover assembly 7 by means of snap-in, fastening by means such as screws, adhesion or other suitable means. Exemplarily, the face plate 9 or the face cover 8 is provided with a downwardly recessed receiving portion 13, and the steam valve 30 is detachably arranged in the receiving portion 13. Optionally, the steam valve 30 comprises a valve upper cover 31 and a valve lower cover 32 which enclose the valve inner cavity P2, a top wall of the valve upper cover 31 forms a top wall of the valve inner cavity P2, and a bottom wall 33 of the valve lower cover 32 forms a bottom wall of the valve inner cavity P2. The valve lower cover 32 can be detachably connected to the valve upper cover 31 by means of a rotary buckle, so as to clean the valve inner cavity P2. Optionally, the steam valve 30 is a micro-pressure valve.

[0095] Optionally, as shown in Figure 2 and Figure 7As shown, the steam passage assembly 20 further comprises a hollow passage sealing member 50. Inner walls of the passage sealing member 50 form a steam diversion passage P1. The steam diversion passage P1 is in communication with the steam inlet 21, so that during cooking, cooking steam enters the steam diversion passage P1 via the steam inlet 21. The steam diversion passage P1 forms part of the steam passage P, i.e. the steam passage P comprises the steam diversion passage P1. The main body portion 51 of the passage sealing member 50 is, for example, cylindrical, and the passage sealing member 50 can further comprise a deformed portion 52 connected to a lower end of the main body portion 51. The passage sealing member 50 can form a sealed passage between the steam inlet 21 and the steam valve 30. Specifically, the deformed portion 52 can abut against a portion of the cover plate 11 around the steam inlet 21, and the main body portion 51 can abut against a bottom of the steam valve 30.

[0096] To secure the passage sealing member 50, the inner liner 6 can be provided with an upwardly extending mounting cylinder 14. The main body portion 51 of the passage sealing member 50 is located within the mounting cylinder 14, and a top of the main body portion 51 is mounted on the mounting cylinder 14. Exemplarily, the top of the main body portion 51 is provided with a mounting groove 53 open towards the mounting cylinder 14, and a top end of the mounting cylinder 14 extends into the mounting groove 53.

[0097] Optionally, to better cook food, the cover 2 is further provided with a temperature measuring device 15 for detecting a temperature of the cooking steam. The temperature measuring device 15 can be arranged on the inner liner 6. For example, the temperature measuring device 15 is arranged along the vertical direction D3, and a temperature measuring probe 16 thereof can extend into the cooking space S, for example, through a hole in the cover plate 11, or alternatively, extend into the steam passage P, for example, through the passage sealing member 50 into the steam diversion passage P1.

[0098] When the cooking appliance 1 is cooking, the cooking steam is usually entrained with air bubbles, and the air bubbles can contain liquids such as rice soup. If the air bubbles gather in the steam passage P, the liquids such as rice soup can overflow from the steam outlet 22. To prevent the liquids from overflowing, a bubble breaking structure can be provided in the steam passage P.

[0099] The steam inlet 21 is generally provided with a small size, and the steam inlet 21 can block a portion of the air bubbles in the cooking space S, and divide a portion of the large air bubbles into small air bubbles. The steam inlet 21 can play a certain bubble breaking role, and is the first line of defense against overflow. Specifically, the cover plate 11 is provided with at least one steam inlet 21 for passing the cooking steam. An area S21 of a single steam inlet 21 is provided as follows: S21≥0.8mm 2 , for example, S21 can be 0.8mm 2 , 1mm 2 , 1.2mm 2 , 1.4mm 2 , 1.6mm 2 , 2mm 22.5mm 2 Optionally, the area S21 is set as: S21≥1.2mm 2 , S21≥1.5mm 2 , or S21≥2mm 2 . The area of the single steam inlet 21 cannot be too small to ensure the steam to pass through the steam inlet 21 smoothly and avoid the pressure of the cooking space S to increase due to the steam not passing out smoothly. The area of the single steam inlet 21 being too small will cause the steam to be blocked by the rice soup at the steam inlet 21, the steam not passing out smoothly, and the pressure of the cooking space S being too large. The bubble is first pressed at the steam inlet 21.

[0100] Optionally, the total area S20 of the at least one steam inlet is set as: 50mm 2 ≤S20≤300mm 2 , for example, S20 can be 50mm 2 , 60mm 2 , 80mm 2 , 100mm 2 , 150mm 2 , 200mm 2 , 250mm 2 , 280mm 2 , 300mm 2 , or other suitable values. The total area of the steam inlets cannot be too small because the total area being too small will affect the passing ability of the cooking steam; the total area being set as greater than or equal to 50mm 2 will make the passing ability of the steam inlets to meet the cooking requirements and ensure the steam to pass through the steam inlets smoothly. The total area of the steam inlets cannot be too large because the total area being too large will not allow the bubble to be pressed sufficiently when passing through the steam inlets; the total area being set as less than or equal to 300mm 2 will make the bubble to be pressed sufficiently when passing through the steam inlets and accelerate the bubble to break.

[0101] Optionally, the number a of the steam inlets 21 is: a≥2, for example, a can be 2, 3, 4, 5, 6, 7, 8, 9, or other suitable values. Further optionally, for example, the number a is: a≥4, a≥6, or a≥8. The steam inlets 21 can have regular shapes, for example, circular, oblong, elliptical, polygonal, or other shapes. Illustratively, Figure 3 9 steam inlets 21 are shown. Optionally, the steam inlets 21 can include a plurality of oblong inlets and a circular inlet in the center, the plurality of oblong inlets being arranged around the circular inlet in the center. Alternatively, the steam inlets 21 can be configured as irregular structures, for example, structures in the form of characters, such as a rice character, or structures formed by connecting at least two steam inlets 21 of regular shapes.

[0102] The cross-sectional area of at least the lower end P12 of the steam guiding passage P1 is greater than the total area of the steam inlet 21. The space defined by the steam guiding passage P1 can be greater than the space defined by the steam inlet 21. The cooking steam flows from the narrow steam inlet 21 into the larger space of the steam guiding passage P1, and the bubbles are subjected to less external pressure, and the bubbles are expanded again after being squeezed, and the deformation also causes a part of the bubbles to break. In order to make the expansion effect better, the volume V30 of the steam guiding passage P1 is set to: V30≥10.6mm 3 . For example, the volume V30 can be 10.6mm 3 , 12mm 3 , 14mm 3 , 16mm 3 , 18mm 3 , 20mm 3 , etc. Optionally, for example, the volume V30 is set to: V30≥12mm 3 , V30≥15mm 3 , or V30≥20mm 3 . The larger space defined by the steam guiding passage P1 can cause the bubbles to be deformed due to effective expansion when a part of the bubbles are squeezed but not broken when passing through the steam inlet 21, and the bubbles are broken due to the deformation, which increases the bubble breaking capacity of the steam guiding passage P1. If the volume of the steam guiding passage P1 is too small, the bubbles cannot be effectively expanded, which affects the bubble breaking effect. The bubbles are expanded for the first time when flowing from the steam inlet 21 into the steam guiding passage P1.

[0103] Optionally, the lower end P12 of the steam guiding passage P1 has a cross-sectional area S31, and the total area S20 of the steam inlet 21 is set to: S20≤1 / 2S31, for example, S20 can be 1 / 2S31, 2 / 5S31, 1 / 3S31, 3 / 10S31, 1 / 4S31, 1 / 5S31, 1 / 6S31, etc. Further optionally, for example, the total area S20 is set to: S20≤1 / 3S31, or S20≤1 / 5S31. If the ratio is too large, the bubbles are bonded together after being squeezed, which affects the anti-overflow effect. Specifically, the larger space defined by the steam guiding passage P1 can avoid the bubbles from being bonded together after being squeezed due to space limitation, and the bonding of multiple bubbles also affects the bubble breaking effect, thereby ensuring the bubble breaking capacity of the steam guiding passage P1.

[0104] In order to improve the bubble breaking capacity of the steam passage P, for example, Figure 2 , Figure 9 and Figure 10As shown, the present application also provides a steam passage member 60. The steam passage member 60 is a hollow structure and the inner wall surface forms a steam discharge passage P3 for discharging cooking steam. The steam discharge passage P3 constitutes a part of the steam passage P, i.e. the steam passage P includes the steam discharge passage P3, and further the steam passage assembly 20 includes the steam passage member 60. In the illustrated embodiment, the steam passage member 60 is arranged at the steam valve 30, in other words, the steam valve 30 includes the steam passage member 60. The steam passage member 60 can be detached from the cover 2 together with the steam valve 30, so as to clean the steam discharge passage P3.

[0105] Alternatively, when the cover 2 is not provided with / does not include the steam valve 30, the steam passage member 60 can also be arranged at other positions in the cover 2, for example, the steam passage member 60 can be arranged at the inner liner 6. At this time, the upper side or upper end of the steam passage member 60 can be provided with a cover with holes, so as to prevent dust in the external environment from entering the cooking space S through the steam passage member 60, and also not to affect the discharge of cooking steam to the external environment.

[0106] Hereinafter, the structure of the steam passage member 60 is described with reference to the illustrated embodiment.

[0107] The steam passage member 60 is located at the lower side of the valve upper cover 31, and the steam passage member 60 penetrates through the bottom wall 33 of the valve lower cover 32 and is connected to the bottom wall. The bottom wall 33 of the valve lower cover 32 is provided with a backflow opening 34 for liquid, so as to return the condensed liquid such as rice soup. Optionally, the bottom wall 33 of the valve lower cover 32 includes a flow guide portion 35 and a lower recessed portion 36. The flow guide portion 35 is arranged to be inclined with respect to the horizontal plane, and the lower recessed portion 36 is recessed downward with respect to the flow guide portion 35. The bottom wall 37 of the lower recessed portion 36 is provided with the backflow opening 34. The condensed liquid such as rice soup is collected at the lower recessed portion 36 along the flow guide portion 35, and returns to the steam drainage passage P1 from the backflow opening 34 of the lower recessed portion 36, so as to flow back to the cooking space S from the steam inlet 21. The flow guide portion 35 is connected to the outer wall surface of the steam passage member 60, and the connection position corresponds to, for example, the middle position of the inlet passage segment P31, or a position above the middle position of the inlet passage segment P31. The bottom wall 37 of the lower recessed portion 36 is connected to the end portion 61 of the outer wall surface of the steam passage member 60 at the inlet opening 63. The inlet opening 63 can be arranged to be substantially on the same plane as the bottom wall 37 of the lower recessed portion 36, and part of the cooking steam is blocked at the bottom wall 37 of the lower recessed portion 36 and flows into the inlet opening 63 along the bottom wall 37 of the lower recessed portion 36, and is collected towards the inlet opening 63.

[0108] The steam passage member 60 can be supported by the valve lower cover 32 so as to be kept on the steam valve 30; the steam passage member 60 and the valve lower cover 32 can be formed as an integral piece, and the integral piece can be detachably connected with the valve upper cover 31 so as to simultaneously clean the valve lower cover 32 and the steam passage member 60 after the valve upper cover 31 is opened. Exemplarily, the steam passage member 60 is integrally formed with the bottom wall 33 of the valve lower cover 32, and the steam passage member 60 and the valve lower cover 32 can be formed together by using an injection molding process, which is simple in production and low in cost. Alternatively, the steam passage member 60 is an independently formed member and is connected to the bottom wall 33 of the valve lower cover 32. The steam passage member 60 is independently formed, which can facilitate more diversified design of the structure thereof and greater design freedom.

[0109] In the steam flow direction, the cross-sectional area of at least one portion of the steam discharge passage P3 is different from that of the other portions. The extension direction of the passage wall forming the at least one portion is different from that of the passage wall forming the other portions at at least the connecting position. Exemplarily, the cross-sectional area of the middle portion of the steam discharge passage P3 is different from that of the other portions, and the extension direction of the middle passage wall forming the middle portion is different from that of the other passage wall forming the other portions at at least the connecting position. Optionally, the cross-sectional area of the middle portion is smaller than that of at least the upstream portion of the other portions. Optionally, the cross-sectional area of the upstream portion of the other portions is greater than or equal to that of the downstream portion of the other portions. Optionally, at least one of the middle portion, the upstream portion and the downstream portion comprises a portion with constant cross-sectional area and / or a portion with variable cross-sectional area.

[0110] The steam discharge passage P3 can comprise an inflow passage segment P31, an overflow passage segment P32 and an outflow passage segment P33. The inflow passage segment P31 is connected with the outflow passage segment P33 via the overflow passage segment P32, i.e. the overflow passage segment P32 is located between the inflow passage segment P31 and the outflow passage segment P33, which is a middle segment. An end 61 of the inflow passage segment P31 away from the overflow passage segment P32 is provided with a steam inlet 63, and an end 62 of the outflow passage segment P33 away from the overflow passage segment P32 is provided with a steam outlet 64. The steam inlet 63 is located outside the valve inner cavity P2, and the steam discharge passage P3 is in communication with the valve inner cavity P2 via the steam outlet 64. The steam inlet 63 of the steam passage member 60 serves as the inlet of the steam valve 30. The steam inlet 21 is in communication with the steam inlet 63 of the steam discharge passage P3 via the steam diversion passage P1. See Figure 1 , Figure 1 The flow route of the cooking steam is schematically shown by the arrowed dashed line. The cooking steam enters from the steam inlet 21, flows into the steam diversion passage P1 first, and then flows into the steam discharge passage P3 from the steam inlet 63.

[0111] The cross-sectional area of at least the upper end portion P11 of the steam guiding passage P1 is greater than the area of the steam inlet 63. The steam inlet 63 is relatively narrow relative to the steam guiding passage P1, and bubbles can be squeezed when entering the steam inlet 63 from the steam guiding passage P1, affecting the stability of the bubbles, and some bubbles can be broken after being squeezed, achieving a certain bubble breaking effect. The bubbles are squeezed for the second time at the steam inlet 63. The upper end portion P11 of the steam guiding passage P1 has a cross-sectional area S32, and the steam inlet 63 has an area S14, and the area S14 is set as: S14≤1 / 2S32, for example, the area S14 can be 1 / 2S32, 2 / 5S32, 1 / 3S32, 3 / 10S32, 1 / 4S32, 1 / 5S32, 1 / 6S31, etc. Alternatively, for example, the area S14 is set as: S14≤1 / 3S32, or S14≤1 / 5S32. The bubbles can be subjected to a certain external pressure at the steam inlet 63, effectively destroying the stability of the bubbles, further improving the bubble breaking capacity of the steam passage P, and achieving better anti-overflow effect.

[0112] The steam passage member 60 has a narrow passage space in the middle. Specifically, the cross-sectional area of the flow passage segment P32 is smaller than that of the inflow passage segment P31, and also smaller than that of the outflow passage segment P33. The internal space of the steam discharge passage P3 changes from large to small, and then from small to large in the steam flow direction, and there is a narrow space at the flow passage segment P32. The cooking appliance 1 generates cooking steam containing bubbles during cooking, and the cooking steam enters the steam discharge passage P3 from the steam inlet 63. The bubbles are squeezed at the narrow flow passage segment P32, including the squeezing of the bubbles by the channel wall and the squeezing of the bubbles by the steam, and some bubbles are broken under the action of external pressure. The bubbles are squeezed for the third time at the flow passage segment P32.

[0113] According to the fluid flow conservation, A1v1=A2v2, the smaller the cross-sectional area A, the greater the flow rate v, so that the flow rate of the cooking steam at the flow passage segment P32 is relatively large, and the bubbles will be subjected to a relatively large shear force, causing the bubbles to deform and locally thin to break. Then the cooking steam flows into the large space defined by the outflow passage segment P33, and the external pressure on the bubbles becomes smaller. The bubbles are expanded again after being squeezed, and the deformation also causes some bubbles to break, which increases the bubble breaking capacity of the steam passage member 60. The steam passage member 60 provided by the present application has better bubble breaking capacity, which can effectively remove the bubbles in the cooking steam and improve the anti-overflow effect. The bubbles are expanded for the second time when flowing from the flow passage segment P32 into the outflow passage segment P33.

[0114] The inlet flow passage section P31 has a maximum cross-sectional area S11, the through-flow passage section P32 has a minimum cross-sectional area S12, and the outlet flow passage section P33 has a maximum cross-sectional area S13. The minimum cross-sectional area S12 can be set as S12≤2 / 3S11 and S12≤2 / 3S13. The minimum cross-sectional area S12 can be set as S12≥3 / 10S11 and S12≥3 / 10S13. That is, 3 / 10S11≤S12≤2 / 3S11 and 3 / 10S13≤S12≤2 / 3S13. For example, S12 can be 3 / 10S11, 1 / 3S11, 2 / 5S11, 1 / 2S11, 3 / 5S11, 2 / 3S11, or the like, or S12 can be 3 / 10S13, 1 / 3S11, 2 / 5S13, 1 / 2S13, 3 / 5S11, 2 / 3S13, or the like. The bubbles can be effectively broken in the through-flow passage section P32 under the external pressure, so that the steam passage member 60 has better bubble breaking capability and better bubble breaking effect. The cross-sectional area of the steam discharge passage P3 at the middle section cannot be too small, so as to ensure smooth passage of the steam through the middle section and avoid the pressure of the steam discharge passage P3 from being increased due to poor steam discharge. If the cross-sectional area of the middle section is too small, the steam can be blocked at the middle section, the steam cannot be smoothly discharged, and the pressure of the steam discharge passage P3 can be too high.

[0115] Optionally, 25mm2≤S11≤900mm2, 15mm2≤S12≤600mm2, and 25mm2≤S13≤1050mm2. For example, S11 can be 25mm2, 100mm2, 200mm2, 300mm2, 500mm2, 700mm2, 900mm2, or the like; S12 can be 15mm2, 25mm2, 100mm2, 200mm2, 300mm2, 500mm2, 600mm2, or the like; and S13 can be 25mm2, 100mm2, 200mm2, 300mm2, 500mm2, 700mm2, 900mm2, 1050mm2, or the like.

[0116] Referring to Figure 9The cross-sectional area of the inflow passage section P31 gradually decreases in the axial direction Di of the inflow passage section P31 itself away from the steam inlet 63. The inflow passage section P31 is a converging section with a gradually decreasing cross-sectional area in the steam flow direction. With the gradually converging inflow passage section P31, the flow velocity of the cooking steam can gradually increase to reach a higher flow velocity at the overflow passage section P32, so that the bubbles are subjected to a greater external pressure in the overflow passage section P32 and are broken more effectively. The cross-sectional area of the outflow passage section P33 gradually increases in the axial direction Di of the outflow passage section P33 itself toward the steam outlet 64. The outflow passage section P33 is a diverging section with a gradually increasing cross-sectional area in the steam flow direction. With the gradually diverging outflow passage section P33, the flow velocity of the cooking steam can gradually decrease, and the effect of the expansion of the bubbles in the outflow passage section P33 on the breaking of the bubbles is better, which is conducive to more bubbles being broken due to the expansion.

[0117] The cross-sectional area of at least a portion of the overflow passage section P32 can be constant in the axial direction Di of the overflow passage section P32 itself. The bubbles can be effectively squeezed in the overflow passage section P32, so that the breaking effect is better, which is conducive to more bubbles being broken due to the squeezing; and the structure is simple and easy to manufacture.

[0118] It should be noted that the "axial direction Di" refers to the direction of the continuous line of the geometric center point on the cross section of the passage. The passage extends in a changing direction, and the axial direction Di also changes accordingly. In this paper, the axial directions Di of the inflow passage section P31, the overflow passage section P32, and the outflow passage section P33 are different.

[0119] The steam inlet 63 and the steam outlet 64 are opposite to each other. In the illustrated embodiment, the steam passage member 60 is arranged in the vertical direction D3, the steam inlet 63 faces downward, and the steam outlet 64 faces upward. The cooking steam can flow in the steam discharge passage P3 from bottom to top, and relative to horizontal flow, the cooking steam can have a higher flow velocity at the overflow passage section P32 to accelerate the breaking of the bubbles. The steam inlet 63 and the steam outlet 64 at least partially overlap in the axial direction Di of the steam discharge passage P3. From the steam inlet 63 toward the steam outlet 64, the steam outlet 64 can be seen from the steam inlet 63, that is, the steam discharge passage P3 is a straight-through passage, and the cooking steam generally flows in a straight line as a whole to reach a higher flow velocity, which is conducive to the accelerated breaking of the bubbles.

[0120] The end face of the inflow passage segment P31 is completely open to form the steam inlet 63, and the inflow passage segment P31 has the largest cross-sectional area at the steam inlet 63. The end face of the outflow passage segment P33 is completely open to form the steam outlet 64, and the outflow passage segment P33 has the largest cross-sectional area at the steam outlet 64. The cooking steam is unobstructed at the steam inlet end and the steam outlet end of the steam discharge passage P3, and can flow smoothly, so that the cooking steam can reach a higher flow rate at the flow passage segment P32, which is conducive to the accelerated rupture of bubbles; and the structure of the steam passage member 60 is simple, which is convenient for production and manufacturing by using the injection molding process, is easier to demold, and has higher production efficiency.

[0121] The steam passage member 60 is a hollow structure surrounded by a wall body of a predetermined thickness. The inner cross section (i.e., the passage cross section) and the outer cross section of the steam passage member 60 at the same position have the same shape, which can be circular, oblong, elliptical, polygonal such as triangular and square, etc. As shown in Figure 11 The cross-sectional shape of the steam passage member 60 of the illustrated embodiment at the steam outlet 64 is rectangular. Alternatively, the size of the steam passage member 60 in a first direction D1, for example, the front-rear direction, is greater than the size in a second direction D2, for example, the left-right direction, wherein the first direction D1 and the second direction D2 are horizontal directions and perpendicular to each other. Exemplarily, as shown in Figures 9 to 11 The steam passage member 60 includes two oppositely arranged first wall bodies 65 and two oppositely arranged second wall bodies 66, the two first wall bodies 65 are arranged along the first direction D1 and are spaced apart in the second direction D2, and the two second wall bodies 66 are arranged along the second direction D2 and are spaced apart in the first direction D1. Adjacent first wall bodies 65 and second wall bodies 66 are connected.

[0122] The two first wall bodies 65 extend substantially along the vertical direction D3, and at least one of the two second wall bodies 66 is inclined relative to the vertical direction D3 to change the cross-sectional area. In the inflow passage segment P31, the second wall body 66 is inclined in the axis direction Di of itself away from the center axis of the steam passage member 60. In the outflow passage segment P33, the second wall body 66 is inclined in the axis direction Di of itself toward the center axis of the steam passage member 60. Alternatively, in the inflow passage segment P31 and the outflow passage segment P33, one of the two second wall bodies 66 is arranged to be inclined relative to the vertical direction D3, and the other of the two second wall bodies 66 is arranged to extend substantially along the vertical direction D3. The inclined second wall body 66 on the inflow passage segment P31 and the inclined second wall body 66 on the outflow passage segment P33 are respectively located on opposite sides of the steam passage member 60.

[0123] In order to further improve the anti-overflow effect, the valve upper cover 31 can also be provided with a bubble breaking structure. As shown in Figure 12As shown, the lower surface 39 of the valve cover 31 is provided with a flow guide wall 40, and the steam outlet 22 is located outside the area provided with the flow guide wall 40. The steam outlet 22 is provided on the outer periphery of the valve cover 31 and is an arc-shaped opening extending along the circumferential direction of the valve cover 31. The flow guide wall 40 forms a spiral channel P4, and the outlet channel segment P33 extends into the starting end of the spiral channel P4, i.e., the center of the spiral channel P4 (see Figure 9 The top end of the steam channel member 60 is at a distance from the lower surface 39 of the valve cover 31, so as to avoid the distance being too small to cause the cooking steam to flow into the spiral channel P4 smoothly, and to cause the gas pressure in the steam outlet channel P3 to increase.

[0124] As shown by the flow route of the cooking steam indicated by the dashed line with an arrow in Figure 1 , the cooking steam and the bubbles left therein reach the spiral channel P4 of the valve cover 31, flow through the spiral channel P4, and then flow towards the steam outlet 22, and finally are discharged from the steam outlet 22. The bubbles expand again in the spiral channel P4, and part of the bubbles break due to the expansion. The liquid overflow often occurs in the continuous boiling stage, in which the amount of steam is large, the steam and the bubbles are accelerated through the steam outlet channel P3, and at the same time, the bubbles perform centrifugal motion in the spiral channel P4 under the action of the continuous steam. Due to the difference in density between the rice soup in the bubbles and the steam, the centrifugal action can separate the gas-liquid in the bubbles, achieve the effect of breaking the bubbles, and finally the rice soup is left in the steam valve 30, achieving the effect of preventing overflow. The presence of the spiral channel P4 also prolongs the path of the bubbles, increases the difficulty of the bubbles flowing out, improves the anti-overflow performance, and prolongs the cooling time of the steam, so that part of the steam is liquefied, and the liquid flows back from the backflow opening 34.

[0125] Optionally, the number of turns n of the spiral channel P4 is set to n≥1.5, and n is, for example, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, etc. Further optionally, for example, the number of turns n is set to n≥2, n≥3.5, or n≥4. The spiral channel P4 is provided with at least 1.5 turns, and the first turn of the channel is to circle the unbroken bubbles and the steam in the spiral channel P4, and the second turn and the downstream channels thereof are used as the enclosing wall for the centrifugal motion. The more the number of turns, the better the anti-overflow effect.

[0126] The flow guide wall 40 can be configured to extend spirally. Alternatively, Figure 13 The general extension structure of the flow guide wall 40 is schematically shown, and the flow guide wall 40 can be configured as concentric arc segments, and a partition plate 42 is arranged between adjacent arc segments, and the partition plate 42 is arranged adjacent to the outlet of the arc segment of the inner turn. The partition plate 42 is arranged such that the steam flows in the same direction, for example, clockwise or counterclockwise. Of course, the structure of the flow guide wall 40 is not limited to the described structure, and any structure capable of achieving centrifugal motion can be used.

[0127] Optionally, referring back to Figure 5 , the upper surface 38 of the valve upper cover 31 is provided with a spiral or spiral-like pattern 41 in the region corresponding to the spiral passage P4. The pattern 41 can be formed by the spiral or spiral-like structure of the upper surface, or can be formed by separate coating, stickers, carving, etc. The spiral pattern 41 can show that the steam valve 30 has a spiral passage P4, so that the consumer can intuitively understand that the steam valve 30 has a spiral passage P4 inside without opening the steam valve 30, and intuitively know that the steam valve 30 of the product can achieve better anti-overflow effect.

[0128] Further, in order to make the steam passage member 60 play a better anti-overflow role, as Figures 14 to 16 shown, the related dimensions of the steam passage member 60 are also defined herein.

[0129] The flow length of the overflow passage section P32 should not be too small, as Figure 14 shown, the overflow passage section P32 has a first size L1 in the axis direction Di of itself, and the steam discharge passage P3 has a second size L2 in the axis direction Di of itself. The first size L1 is set as: L1≥1 / 5L2, for example, L1 is 1 / 5L2, 1 / 4L2, 3 / 10L2, 1 / 3L2, 2 / 5L2, etc. Optionally, for example, the first size L1 is set as: L1≥1 / 4L2, or L1≥1 / 3L2. The overflow passage section P32 can provide a certain flow length, so that the bubbles can be continuously affected by external pressure for a certain time, and the bubbles can be effectively squeezed and deformed, so that more bubbles are broken; and the acceleration effect on the bubbles and cooking steam is better, effectively improving the shear force of the bubbles and accelerating the breaking of the bubbles.

[0130] Optionally, the first size L1 is: 3mm≤L1≤20mm; for example, the first size L1 is 3mm, 5mm, 8mm, 10mm, 12mm, 15mm, 18mm, 20mm, etc. Optionally, the overflow passage section P32 is connected with the inflow passage section P31 through a curved transition portion 67, and is connected with the outflow passage section P33 through another transition portion 67. In this way, the steam flow can be smoothly transitioned, and the flow is more stable. In this paper, the overflow passage section P32 includes the two transition portions 67. The transition portion 67 is, for example, arc-shaped, and can also be other curved shapes.

[0131] As Figure 15As shown, the size A of the steam outlet 64 in the second direction D2 is 5mm≤A≤30mm; for example, the size A can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, or other suitable values. The size B of the steam outlet 64 in the first direction D1 is 5mm≤B≤35mm; for example, the size B can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, or other suitable values. If the area of the steam outlet 64 is too small, the steam cannot be discharged, affecting the anti-overflow. If the area of the steam outlet 64 is too large, the steam discharge is too large, and some bubbles cannot be broken in time, causing liquid to overflow. For ease of dimensioning, Figure 16 The steam passage member 60 in the first embodiment is removed from the outflow passage section P33, and the cross section of the outflow passage section P32 is shown. As shown, Figure 16 The size C of the outflow passage section P32 in the first direction D1 is 3mm≤C≤20mm; for example, the size C can be 3mm, 5mm, 10mm, 15mm, 20mm, or other suitable values. The size D of the steam inlet 63 in the first direction D1 is 5mm≤D≤30mm; for example, the size D can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, or other suitable values. Alternatively, the sizes of the outflow passage section P32 and the steam inlet 63 in the second direction D2 can be substantially the same, and the size E of the two in the second direction D2 is 5mm≤E≤30mm; for example, the size E can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, or other suitable values. Alternatively, the sizes of the outflow passage section P32 and the steam inlet 63 in the second direction D2 are different. If the cross-sectional area of the steam inlet 63 is too small, the steam cannot be discharged, affecting the anti-overflow. If the cross-sectional area of the steam inlet 63 is too large, the steam discharge is too large, causing overflow.

[0132] Test test

[0133] Embodiment: The electric rice cooker provided in the present application is used to cook rice.

[0134] Comparative example: A common rice cooker is used to cook rice.

[0135] Cooking conditions: Except for the different power control, other cooking conditions are substantially the same, including the volume of the inner pot, the amount of rice added, the amount of water added, the operating voltage, etc. For example, the amount of rice added is 300g, the amount of water added is 750g, and the operating voltage is 220V.

[0136] Figure 17The green curve shown is the heating power curve of the example rice cooker, and the yellow curve is the heating power curve of the ordinary rice cooker. The example rice cooker is heated in full power mode in the early stage of cooking, for example, in the water absorption stage and the temperature rising stage. The ordinary rice cooker of the comparative example is heated in the power mode with a preset duty cycle in the early stage of cooking, for example, in the water absorption stage and the temperature rising stage. It should be noted that, Figure 17 The heating power curve of the holding stage is not shown.

[0137] The rice is cooked using the above cooking conditions and heating power. During the cooking process, the tester observes the steam outlet at the steam valve. The example rice cooker does not have bubbles and liquid overflowing from the steam outlet of the steam valve during the entire cooking process, while the ordinary rice cooker of the comparative example has a large amount of foam spattering out in the middle and late stages of the cooking process, which can reach level 4 overflow. After the cooking is completed, the total cooking time of the example rice cooker is shorter due to the full power heating in the early stage.

[0138] It should be noted that the overflow level can be divided into 0-4 levels, or more than 4 levels. Each level mainly requires 0 level: no bubble phenomenon; 1 level: slight bubbling, no rice soup marks on the cover; 2 level: large bubbles, no foam spattering, no obvious rice soup marks on the cover; 3 level: foam spattering, cover with large bubble burst rice soup marks; 4 level: foam spattering, cover with obvious rice soup flowing marks, flowing distance greater than 1 cm.

[0139] Therefore, through the test, it has been proved that the cooking appliance provided by the present application has better bubble breaking capacity, which can effectively remove the bubbles in the cooking steam and improve the anti-overflow effect. In the case of full power heating in the early stage of cooking, the overflow level can also reach level 0. Therefore, the cooking appliance provided by the present application is more suitable for short-time, fast-cooking application requirements, saves the cooking time of consumers, and improves the use experience of consumers.

[0140] The order of steps of the method of the present embodiment can be adjusted, combined or deleted according to actual needs. The units of the terminal of the present embodiment can be integrated, further divided or deleted according to actual needs.

[0141] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The features described in one embodiment herein can be applied to another embodiment, either alone or in combination with other features, unless the features are not applicable in the other embodiment or are otherwise stated.

[0142] The utility model has been through the above -mentioned implementation has carried out the explanation, but should understand, the above -mentioned implementation is only for the purpose of example and illustration, the utility model is not limited to the above -mentioned implementation, according to the teaching of the utility model still can make more kinds of variation and revision, these variations and revision all fall within the range of the utility model claimed to protect.

Claims

1. A steam channel component for a cooking appliance, characterized in that: The steam channel member is a hollow structure and the inner wall thereof forms a steam discharge channel for discharging cooking steam. The steam exhaust channel includes an inlet channel section, a flow channel section, and an outlet channel section. The inlet channel section is connected to the outlet channel section via the flow channel section. An end of the inlet channel section away from the flow channel section is provided with a steam inlet, and an end of the outlet channel section away from the flow channel section is provided with a steam outlet. Among them, the cross-sectional area of ​​the overflow channel section is smaller than the cross-sectional area of ​​the inlet channel section, and is also smaller than the cross-sectional area of ​​the outlet channel section; the overflow channel section has a minimum cross-sectional area S12, and the minimum cross-sectional area S12 is: 15mm²≤S12≤600mm².

2. The steam passage component according to claim 1, wherein The inlet channel section has a maximum cross-sectional area S11, and the maximum cross-sectional area S11 is: 25 mm²≤S11≤900 mm².

3. The steam passage component according to claim 1, wherein The outflow channel section has a maximum cross-sectional area S13, and the maximum cross-sectional area S13 is: 25mm²≤S13≤1050mm².

4. The steam passage component according to claim 1, wherein The cross-sectional area of ​​the inlet channel section gradually decreases in the axial direction of the inlet channel section facing away from the steam inlet; And / or the cross-sectional area of ​​the outflow channel section gradually expands in its own axial direction toward the steam outlet.

5. The steam passage component according to claim 1, wherein The cross-sectional area of ​​at least a portion of the flow channel section is constant in the axial direction thereof.

6. The steam passage component according to claim 1, wherein The flow passage section has a first dimension L1 in its own axial direction, and the steam discharge passage has a second dimension L2 in its own axial direction. The first dimension L1 satisfies the following conditions: L1 ≥ 1 / 5 L2.

7. The steam passage component according to any one of claims 1 to 6, characterized in that The steam inlet and the steam outlet are oriented in opposite directions and at least partially overlap in the axial direction of the steam discharge channel.

8. The steam duct component according to any one of claims 1 to 6, characterized in that The end surface of the inlet channel section is completely open to form the steam inlet, and the end surface of the outlet channel section is completely open to form the steam outlet; And / or the steam channel component is arranged in a vertical direction, the steam inlet faces downward, and the steam outlet faces upward.

9. A cover for a cooking utensil, characterized in that: The cover comprises the steam passage member according to any one of claims 1 to 8.

10. A cooking utensil, characterized in that: The cooking utensil comprises a pot body and a cover according to claim 9 , wherein the cover body is openably and closably arranged on the pot body to form a cooking space therebetween, and a steam inlet of the cover body is communicated with the cooking space.

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